南京长江四桥超深地下连续墙施工技术  

Construction Technology of Super-deep Diaphragm Wall of Fourth Nanjing Changjiang River Bridge

作　　者：段朝静[1] 徐伟[1] 何超然 

机构地区：[1]同济大学土木工程学院,上海200092 [2]中交二航局,湖北武汉430014

出　　处：《施工技术》2010年第2期39-42,共4页Construction Technology

基　　金：南京长江第四大桥科学研究项目

摘　　要：南京长江四桥南锚碇基础采用井筒式地下连续墙结构形式,平面形状为"∞"形,存在周围环境复杂及石油管线等众多制约因素,施工控制要求严格。通过对南京长江四桥南锚碇基础"∞"形超深地下连续墙施工的工程实例的研究,介绍"∞"形超深地下连续墙施工工艺。并针对工程施工中的难点,对影响"∞"形超深地下连续墙施工质量的控制要点进行分析和归纳。施工实践的结果表明,南京长江四桥南锚碇基础"∞"形超深地下连续墙的工程质量符合国家规范的要求,确保了基坑开挖和后续基础结构施工的安全性。The shaft type and ∞-shaped super-deep diaphragm wall are adopted in south anchorage foundation of the Fourth Nanjing Changjiang River Bridge.At the same time,there are complicated peripheral environment,oil pipelines and other restrictions,thus,it requires more strict construction control. Based on the construction example of ∞-shaped super-deep south anchorage diaphragm wall of the Fourth Nanjing Changjiang River Bridge,the main construction technologies of ∞-shaped super deep diaphragm wall are outlined.Because of the inherent construction difficulties,control points which can influence the quality of the diaphragm wall are analyzed and summarized.The results of construction practice confirm that engineering quality of ∞-shaped super-deep south anchorage diaphragm wall can meet the requirements of national codes and assure the safety of foundation excavation and subsequent infrastructure.

关 键 词：桥梁工程 地下连续墙 成槽技术 

分 类 号：U443.164[建筑科学—桥梁与隧道工程]